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In this paper we introduce a refined multiplicity for rational tropical curves in arbitrary dimension, which generalizes the refined multiplicity introduced by F. Block and L. G\"ottsche in arXiv:1407.2901 . We then prove an invariance…

Algebraic Geometry · Mathematics 2021-03-24 Thomas Blomme

Tropical refined invariants for toric surfaces, introduced Block and G{\"o}ttsche, are obtained couting tropical curves with a Laurent polynomial multiplicity. Brugall{\'e} and Jaramillo-Puentes then exhibited a polynomial behavior of the…

Algebraic Geometry · Mathematics 2026-02-04 Thomas Blomme , Gurvan Mével

Block and G\"ottsche introduced a Laurent polynomial multiplicity to count tropical curves. Itenberg and Mikhalkin then showed that this multiplicity leads to invariant counts called tropical refined invariants. Recently, Brugall\'e and…

Algebraic Geometry · Mathematics 2025-01-13 Thomas Blomme , Gurvan Mével

We prove invariance for the number of planar tropical curves enhanced with polynomial multiplicities recently proposed by Florian Block and Lothar Goettsche. This invariance has a number of implications in tropical enumerative geometry.

Algebraic Geometry · Mathematics 2012-01-04 Ilia Itenberg , Grigory Mikhalkin

Block and G\"ottsche have defined a $q$-number refinement of counts of tropical curves in $\mathbb{R}^2$. Under the change of variables $q=e^{iu}$, we show that the result is a generating series of higher genus log Gromov-Witten invariants…

Algebraic Geometry · Mathematics 2019-04-24 Pierrick Bousseau

We address the problem of existence of refined (i.e., depending on a formal parameter) tropical enumerative invariants, and we present two new examples of a refined count of rational marked tropical curves. One of the new invariants counts…

Algebraic Geometry · Mathematics 2019-09-17 Eugenii Shustin

F. Block and L. G\"ottsche introduced refined tropical invariants of toric surfaces that intertwine tropical Gromov-Witten and Welschinger invariants of toric surfaces. L. G\"ottsche and the first author introduced refined broccoli…

Algebraic Geometry · Mathematics 2017-01-03 Franziska Schroeter , Eugenii Shustin

We construct refined tropical enumerative genus zero invariants of toric surfaces that specialize to the tropical descendant genus zero invariants introduced by Markwig and Rau when the quantum parameter tends to $1$. In the case of…

Algebraic Geometry · Mathematics 2019-05-09 Lev Blechman , Eugenii Shustin

In 2022, Brugall{\'e} and Jaramillo-Puentes showed that the coefficients of small codegree of the tropical refined invariant are polynomial in the Newton polygon. This raised the question of the existence of universal polynomials giving…

Algebraic Geometry · Mathematics 2023-12-29 Gurvan Mével

We prove that the G\"ottsche-Schroeter and Schroeter-Shustin refined invariants specialize at $q=1$ to the enumeration of rational, resp. elliptic complex curves on arbitrary toric surfaces matching constraints that consist of points and of…

Algebraic Geometry · Mathematics 2024-10-08 Eugenii Shustin , Uriel Sinichkin

This paper is the first part in a series of three papers devoted to the study of enumerative invariants of abelian surfaces through the tropical approach. In this paper, we consider the enumeration of genus $g$ curves of fixed degree…

Algebraic Geometry · Mathematics 2024-11-27 Thomas Blomme

In 2015, G.~Mikhalkin introduced a refined count for real rational curves in toric surfaces. The counted curves have to pass through some real and complex points located on the toric boundary of the surface, and the count is refined…

Algebraic Geometry · Mathematics 2025-10-01 Thomas Blomme

We propose a geometric interpretation of Block and G\"ottsche's refined tropical curve counting invariants in terms of virtual $\chi_{-y}$-specializations of motivic measures of semialgebraic sets in relative Hilbert schemes. We prove that…

Algebraic Geometry · Mathematics 2018-10-03 Johannes Nicaise , Sam Payne , Franziska Schroeter

The generating functions of the Severi degrees for sufficiently ample line bundles on algebraic surfaces are multiplicative in the topological invariants of the surface and the line bundle. Recently new proofs of this fact were given for…

Algebraic Geometry · Mathematics 2015-11-10 Lothar Göttsche , Benjamin Kikwai

In arXiv:1505.04338(4), G. Mikhalkin introduced a refined count for the real rational curves in a toric surface which pass through certain conjugation invariant set of points on the toric boundary of the surface. Such a set consists of real…

Algebraic Geometry · Mathematics 2020-02-04 Thomas Blomme

The motivic nearby fiber is an invariant obtained from degenerating a complex variety over a disc. It specializes to the Euler characteristic of the original variety but also contains information on the variation of Hodge structure…

Algebraic Geometry · Mathematics 2021-10-05 Eric Katz , Alan Stapledon

We prove a $q$-refined tropical correspondence theorem for higher genus descendant logarithmic Gromov--Witten invariants with a $\lambda_g$ class in toric surfaces. Specifically, a generating series of such logarithmic Gromov--Witten…

Algebraic Geometry · Mathematics 2024-12-06 Patrick Kennedy-Hunt , Qaasim Shafi , Ajith Urundolil Kumaran

The Severi degree is the degree of the Severi variety parametrizing plane curves of degree d with delta nodes. Recently, G\"ottsche and Shende gave two refinements of Severi degrees, polynomials in a variable y, which are conjecturally…

Algebraic Geometry · Mathematics 2019-02-20 Florian Block , Lothar Göttsche

We introduce new invariants of the projective plane (and, more generally, of certain toric surfaces) that arise from the appropriate enumeration of real elliptic curves. These invariants admit a refinement (according to the quantum index)…

Algebraic Geometry · Mathematics 2023-03-14 Ilia Itenberg , Eugenii Shustin

We use the tropical geometry approach to compute absolute and relative Gromov-Witten invariants of complex surfaces which are $\CC P^1$-bundles over an elliptic curve. We also show that the tropical multiplicity used to count curves can be…

Algebraic Geometry · Mathematics 2022-12-14 Thomas Blomme
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